Rotary pump, compressor, and the like



y M. R. HuTcHlsoN, JR 1,986,202 ROTARY PUMP, COMPRESSOR, AND THE LIKElJan. l, 1935.

Filed Jan. 21, 1933 2 Sheets-Sheet l INVENTR /1/1? RHl/rcH/som Jl?.

v oNEY Jan. 1, 1935.

M. R. HuTcHlsoN, JR' 1,986,202 ROTARY PUMP, COMPRESSOR, AND THE LIKEFiled Jan. 2l, 1933 2 Sheets-Sheet 2 7 37 I5 4 JZ 4Z J3 y 35 J3 INVENTORMR//urc/f/sm, JR

aiented Jan. i, i935 UNITED STATES rATENTvfoi-frics Miller B. Hutchison,Jr., Madison, N. J., assigner to Multicycol Pump & Ena'lne Corporation,New York, N. Y., a corporation of New York Application January 21, 1933,Serial No. 652,861

7 Claims. (Cl. 10S-124) This invention relates to machines and appara.-rockers and the material may be metallic or nontus in the nature ofrotary pumps. metallic. Certain composition materials, such Specialobjects of the invention are to secure for example, as that known in thetradeas "Mia relatively great working displacement per revccaare-desirable, because they are light and E lution in a compact smallunit and free of the strong and possess a certain degree of resiliency,

usually attendant high rubbing velocities of roenabling them to closelyfollow the cam contour tary pumps, compressors and the like. Other deandto accommodate themselves to any slight irsirable objects and the novelfeatures of conregularities there maybeinsuch contour. These struction,combinations and relations ofparts by composition rockers may beaccurately molded to l0l which the desired results are attained willapexact size, operate with but slight friction and l0 Fig. 2 is an endelevation of the same. of the cylinder and the end heads of the machine.20

pear as the specification proceeds. the wear is low.

The drawings accompanying and forming part The rocker seats are providedin the Present of the specication illustrate certain practicaldisclosureinacylndrieel SnDPert 15,which serves. commercial embodimentsof the invention, it be.- in addition, BS the Spacing member between theing understood that the actual physical structure end heads 16, 17 ofthe machine, the latter being 15 may vary, all within the intended broadscope of secured by SCreWS 18. in `abutting engagement the claims. -v'with the shouldered .seats 19, 20, in the ends of the f Fig. 1 is abroken longitudinal sectional view of cylinder. Annuler gaskets areshown provided at the invention embodied in the form of a pump. 21,about these abutting joints between the ends Fig. 3 is a cross-sectionalview as on substan- Bearings 22. 23. are Provided in the end bendetially the plane of line 3-3 of Fig. 1. for the shaft extensions 24, 25,of the cam or im- Fig. 4 is an enlarged broken sectional detail ofpeller. the cam and rocker formation. In the present disclosure, the camor impeller Fig. 5 is a broken end view showing particuis hollowedoutasindicated at 26, to form aninlet 25 larly the supporting cylinder.for the fluid and consequently the shaft extension The desired largeworking displacement is at- 22 is tubular'in form. The opposite shaftex.

tained in this invention through the cooperative tension 25 may be SOlidand be equipped with e combination of a series of preferably symmetri-.key 21, or the like, for a driving gear or pulley.

-0 cally grouped hollow rockers 7 and concentrically For the entry offluid into the tubularl end of 30 related cam or impeller 8. This cam isshown the cam.` the Sln'I'Ollnding bearing 0f the end plete as ofgenerally triangular shape having three 16 is shownas having a tubularscrew threaded equi-distant rounded lobes 9, connected by planeextension 28, adapted t0 receive Suitable pipe conllanks l0. nectlons.V

z5 The rockers are shown as of somewhat greater For convenience ofmounting and diSnlOnnting. 35

' than semi-cylindrical form disposed in seats 1l, both bearingextensionsfof the end plates" are which are of greater thansemi-cylindrical out- Shown in the ferm 0f hubs 29. Which may be 1'0-line, so as to actually retain and support the tatably SUDPOIted as OI'tenllle measuring P111'- rockers. The cavities in the inner exposedfaces poses and the like, and which in the case of a i0 of the rockersare shown as curves 12, substanpermanent installation, as hereillustrated, may 40 tally concentric with the nose curves of the cam bekeyed at 30, in split supporting standards 31, lobes, joining at theends with convex follower having the cap portions 32, removably securedcurves 13, for closely riding the cam faces. The as by bolts 33, -whichconstruction enables quick Y clearance or lack of clearance at 14,between the' mounting or unmounting of the apparatus as a i5 rockerhollows and cam lobes may vary in diiferunit. 'I'he bearing hub at thedrive end of the 45 ent designs, depending on the nature of the uidmachine may carry a suitable shaft packing, such and the use of theapparatus. For handling oils, as indicated atA 34, with an adjustablegland and particularly furnace oils, in which certain nut 35. 4 amountof impurities may be present, a slight The combined rotary andoscillatorymovements clearance is desirable, such as that indicated inof the cam and rockers are utilizedinthe illustra- 50 the illustration,Fig. 3. tion to accomplish the necessary valving func- 'I'he rockers maybe shaped in continuous tions. l

lengths or rods of the cross-section illustrated, Thus the cam is shownas having inletports 36.

produced by casting, molding, rolling or machinextending from the hollowinterior out through e5. ingandcut in the proper lengths for individualthe leadfaces of the lobes, direction of rotationters 42, located equaldistances to opposite sides slots, as indicated in Fig. 1, but it willbe realized that for a short form of construction, a single se of slotswill suiilce.

For manifolding purposes, the outlet ports 38 and the cylinder are shownas all connected by a surrounding casing shell 39, which may have anoutlet, such as indicated at 40, and preferably located at the bottom toserve as a drain and to carry out any dirt in the oil or other uid.

In the detail view, Fig. 4, a preferred design of cam and rocker form isillustrated, wherein it will be seen that therocker center 41,substantially coincides with the point of the cam lobe and that thefollower faces 13, are struck from cenof the rocker center on the samediametrical line 43, passing through that center. The nose of the cam isshown as an arc struck from a center 44, and joined with the iianks ofthe cam by slightly greater arcs struck from thecenter 45. Thisconstruction and relation provides a desirable cam contour andsmooth-following rocker action. The cam ports 36 are here shown as o'-set substantially parallel with a radial line 46, drawn from the shaftcenter 47 and the rocker ports 37 are shown as inclined in the samegeneral direction, that is rearwardly, in the direction l opposite todirection of cam movement. I n the position of parts appearing in Fig.4,`this effects opening of the rocker ports to the outlet portsapproximately at or slightly following closure of the cam ports. 1

. The entry of liquid through the center and outward fiow through thecam makes use of centrifugal force and enables the cam to operate as animpeller. This action is further facilitated, because of the continuedoutward ow through the rocker and cylinder ports to the surroundingmanifold. The distribution of ports in both the cam and the rockers,enablesl these being made of ample size and the relative fplacinglofsame to effect desired valving and pressure results. The rocker seats ofmore than semi-cylindrical form brace and confine the rockers fulllength and enable these being relatively light and with considerableport areas therein.

The impeller cam and the rockers are nished with their ends flush andhave ample sealing surfaces i'n engagement with the end walls of the'casing structure and the rockers and cam design maintain constantengagement with the cam face, so that no packing is required forhandling fluids, suchas fuel oil, except possibly for the usual shaftpacking here illustrated.

While a three lobe cam and four cooperating rockers constitute adesirable combination of these elements, it will be understood that thecam may vary in the number of lobes and that the number of rockersemployed may differ/for various sizes of machines. materials handled,pressures developed, volume, speed, special purposes of the machine,etc.

The rocker seats being of greater than Semicylindrical dimensions,provide supports for the rockers extending inwardly as close as possibleto the cam and hence afford proper backing for the rockers, preventingthem from binding under the thrust of the cam lobes. These seats willhold the rockers in place after removal of the impeller cam and theyprovide extended bearing surfaces affording ample sealing contactbetween rockers and seats. Also the greater than semi-cylindrical seatsprevent distortion, particularly in the longer lengths of rockers andproduce a Better valving operation, where the rockers are utilized ashere, to serve also as valves. The convexly rounded tips or ends of therockers enable vthem to smoothly follow the cam face and to maintainproper seal at all times without undue friction. If desired, the ends ofthe rockers and impeller may be sea-led by a special end plate having aself-adjusting foating engagement with the same. Other changes andmodifications may be made, within the true intent and scope of thefollowing claims.

What is claimed is: Y

1. A machine of the character disclosed, cornprising in combination,cooperatively engaged re1- atively rotatable cam and rocker members, theengaging faces of said rockers having cavities cooperating with the camface and end seals between the cam amd rocker members to form variabledisplacement chambers and said cam and rocker members having valve portsfor effecting transfer of uid to and from said chambers in the movementsof the same.

2. In combination, a hollow rotatable impeller cam having a porttherethrough, a plurality of rockers each having a cavital chamber-denngface cooperating with said cam and having a port opening away from saidchamber-defining face, end seals between the ends of the rockers "andthe sides of the impeller cam completing variable displacement chambersbetween the cam 'and rockers and whereby Aupon rotation of the cam,transfer of uid may be effected between the cam and rockers.

3. In combination, a support having circular seats with portstherethrough, circular ported rockers operating in said seats and havingexposed hollow faces, a ported lobed'member cooperatingQwith the hollowfaces ofsaid ported rockers, end seals between the sides of said lobedmember and the ends of said hollow rockers completing variabledisplacement chambersA between said lobed member and rockers and saidlobed member being rotatable to effect or enable displacement of fluidto and from said chambers through said lobed mmber and rockers.

4. In combination,.a support having a cylindraceous seat with a portopening therethrough, a cylindraceous rocker journalled for rockingmovements in said seat and having a port to register with said seat portin the rocking movements of the same, a rotary lobed member engagingsaid-rocker, said rocker'having a concave face opposed to the lobedmember and said latter member. having a port to register with theconcavity of the r'ocker member and end seals between the ends of therocker and sides of the lobed member completing a variable displacementchamber between the rocker and lobed fmember, whereby upon rotationv ofsaid member, uid can be passed to and from said chamber. 5. In a machineof the character disclosed, the

combination of a generally cylindrical support having longitudinallyextending cylindraceous seats, cylindraceous rockers journalled in saidseats and having inwardly disposed concave faces, a lobed memberjournalled to cooperatively engage the concave face portions of saidrockers, a chamber surrounding said cylindrical support and having endwalls sealing the chambers dened between the rockers and lobed memberand porting connections between the rockers and said surrounding chamberfor passing fluid from said chambers in rotation of said lobed member.

6. A machine of the character disclosed, comprising a casing having endbearings, a rotatable cam in said casing and having shaft endsjourna-lled in said bearings, one of said shaft ends being of tubularform and the cam having a hollow interior in communication with saidtubular shaft, saidcam being further ported from said hollow interiorthrough the outer surface of the same, a rocker J'ournalled in thecasing and having a concave face portion engaged with the cam face, saidrocker having a passage extending therethrough from the concave face ofthe same and the supporting portion of the casing having apcrt forregistry with said passage.

7. A machine of the character disclosed, comprising a. casing having agenerally cylindrical wall, a rocker journalled in said/casing andhaving a hollow face coextensively related to said cylindrical wall,said rocker and casing having companion valve elements to function inthe oscillating movements of said rocker and an impeller cam operatingin said casing and having a lobe or lobes engaging said cylindrical wallof the casing and both edges of said rocker at opposite sides of saidhollow face of the rocker and said casing having end walls sealing thespaces defined between the hollow rocker and cam whereby upon rotationof the cam displacement of fluid may be effected in respect to saidchal/13.3,

ber. v 4 di Y MILLER R. HUTCHISON, JR.

